| Stability loss of organic-inorganic hybrid perovskite solar cells due to ion migration |
| Paper ID : 1203-UFGNSM-FULL |
| Authors: |
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Farzaneh Arabpour *1, Vahid Ahmadi2, Farzaneh Ghoreishi3, Karim Oniy Aghmiuni3, Masoud Payandeh2, Ali Shokrolahzadeh2 1Faculty of Electrical and Computer engineering, Tarbiat Modares University, Tehran, Iran 2Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran 3Material Engineering Department, Faculty of Engineering and Technology, Tarbiat Modares University, Tehran, Iran |
| Abstract: |
| Although the efficiency of perovskite solar cells has rapidly risen up to 20%, the significant challenge still remains regarding the device stability and lifetime. In the meantime, the stability of the perovskite devices is a vital factor that defines their feasibility of commercial production. It is known that the degradation and lifetime of a device are strongly dependent on all its components, fabrication process, and storing conditions. In the present work, perovskite devices with ITO (100nm) /PEDOT:PSS (50nm)/CH3NH3PbI3 (300 nm) /PCBM (50 nm)/Ag (100nm) configuration was fabricated. The stability and degradation behavior of perovskite layer and perovskite solar cell were separately studied. The exact role of organic cation halide as a source of ion migration in the degradation process was investigated and the degradation mechanisms were proposed. The morphological, chemical, and structural changes were studied using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses. The results showed that more ion migration caused faster degradation due to the conversion of Ag contact into the AgI. By preventing the migration of I- by composition engineering, the device degradation was delayed from few hours to few days. Moreover, hysteresis effects were controlled, leading more reproducibility. |
| Keywords: |
| Perovskite solar cell, ion migration, stabilty |
| Status : Paper Accepted (Oral Presentation) |
